Dear Hibernaters,


When you use the Hibernate Code Generation Feature of Hibernate Tools (actually using Hibernate Tools 3.1.0.beta4) you can choose to generate the DAO java code.

I would like to know if you can control the way this code is generated, like the class name; the DAO methods names e the way the session factory is created.

Some examples of this control:
a) The classes generated are named ModelClassHome.java, can you use a different strategy and name them like ModelClassDAO.java?

b) A method created like attachDirty(ModelClass), can be created with a different name like attach(ModelClass)? In order words, can I control the methods signature?

c) The SessionFactory is always created by the method getSessionFactory() and it relies on JDNI. If you are creating a Web Application and this object is created using a plug-in or a filter, can the way this method is created be changed to reflect a requirement like that?

Thanks in advance for you attention and support.

copy the dao/daohome.vm template and change it to what you want.

if you add something usefull/configurable then i encourage you to submit it as patches to our jira - thank you.

Hi Max,

I had modified the DAO files to be generated to have the class name as <tablename>DAO instead of the default <tablename>Home in the daohome.vm and checked the Use custom template option in Code Generation console so as to override the existing daohome.vm in the tool jar.

The problem is that the file is generated with class name <tablename>DAO in the file but saved as <tablename>Home.java in the reverse engg package.

Kindly let me know how to resolve this issue.

Does it have to do anything with the DAOExporter.class file under org\hibernate\tool\hbm2x of the hibernate-tools.jar. the init() has the statement: setFilePattern("{package-name}/{class-name}DAO.java")

Thanking you in advance.

you can use <hbmtemplate> with ant and solve it.

it is not exposed fully in the ui yet

Hi all,



I have been searching for solutions to this exact same isse (and other related), and all point to this solution. Use ant instead of the UI.

Is there no other way?
Even if we have to provide generator classes we create, or fill a few XML files, etc. But instead of having to use an ANT task stiil be able to use the Hibernate Tools UI for the table selection and other parameters customized in any way possible?

Basically what I find everyone asks for is the ability to change the generated class file names, and to be able to provide new templates (*.vm) for generation of other classes for each entity/table with is reversed engeneered.

I gather from your response Max that you are thinking to extend the UI to acomodate some of these requests.
Basically what I ask here is if there is any other way other than an ANT task to acomplish this result even if we have to extend a custom generator class as Sangeeta pointed out...



We can provide an reveng.strategy class. Is this a way to get to a solution?

Thanks and sorry for the insistence on this issue.

Recargs

you can still use the ui for table selection etc. it is the same reveng.xml file you will be using.

And yes, i have plans for adding more customization to the ui (e.g. control the class of the exporter and its parameters)

Thanks Max.
Will try that.
Read some more on the ANT tool and saw what you mean.
Will use till the UI gives this option.

Thanks again!

Hi Max,

I am back again with questions ;)

I am very new to Hibernate and as suggested by you earlier i had used the ant tool to generate <tablename>DAO.java file instead of the default <tablename>Home.java.
Thanks for that early reply.

By build.xml has the following:

<target name="hibernatetools" description="Generates DAO and DAOHibernate">
<taskdef name="hibernatetool"
classname="org.hibernate.tool.ant.HibernateToolTask"
classpathref="tool.path" />
<hibernatetool destdir="src/work">

<jdbcconfiguration configurationfile="src/hibernate.cfg.xml"
packagename="work" />
<hbmtemplate template="myeclipse_templates_4.1.0/dao/daohome.vm"
filepattern="{class-name}DAO.java"/>
</hibernatetool>
</target>

The daohome.vm has been modified to use the DAO suffix for the classname. I have not changed anything else in this template. The Java files are generated but there are 2 issues that i am facing:

1. All tables in the desired schema with no PK specified generate 2 DAO files named <tablename>DAO.java and <tablename>IdDAO.java.
---- How do i resolve this as i req only the 1st file? If there are other vms that do a PK check then do let me know how to modify the same to prevent the 2nd file generation?

2. The findById() in the daohome.vm i.e.
public ${declarationName} findById( $c2j.getJavaTypeName($clazz.identifierProperty, $jdk5) id) {..blablabla..}
In the DAO file generated this method carries the same parameters as specified in the vm i.e.
public AcceptedParty findById( $c2j.getJavaTypeName($clazz.identifierProperty, $jdk5) id) {...}
whereas if i use the Hiberante Code genaration tool the DAO file contains the valid parameter namely,
public AcceptedParty findById( java.lang.String id) {..}---What is the mistake that i am commiting?

Do let me know if you require more details.

Thanking you in advance,

Regards,

1. There *has* to be a primary key that can be used to identify the rows.
If the database does not have them (crazy ;) then you can add something like this to reveng.xml:

<table name="SOME_TABLE">
<primary-key>
<column name="THE_COLUMN"/> <!-- you can have multiple columns here -->
</primary-key>
</table>

btw. the dao generation should definitly not in any case try to generate a dao for a primary key class - could you report this in jira so we fix that particular bug.

2. this is little tricky (will be fixed in future version),
but the problem is the template needs the jdk5 property set.

put <property> tag to remedy it. something like:
<hbmtemplate ...>
<property key="jdk5" value="true or false"/>
<property key="ejb3" value="true or false"/>
</hbmtemplate>

Hi max,

I am looking out for customizing the DAO, but in the latest release of Hibernate tools, things are different I guess. Can you please let me know how to go about with the latest release of Hibernate Tools. I am not able to find hibernate tools jar.

Regards,
Hari

nothing is different with respect to where hibernate-tools.jar is located.

well, I tried downloading the hibernate tools (followed the download link from the main page). What I get is a zip containing features and plugins folder for eclipse.

read the docs...first page contains:

1.3. Ant

To use the tools via Ant you need the hibernate-tools.jar and associated libraries. The libraries are included in the distribution from the Hibernate website and the Eclipse updatesite. The libraries are located in the eclipse plugins directory at /plugins/org.hibernate.eclipse.x.x.x/lib/tools/. These libraries are 100% independent from the eclipse platform. How to use these via ant tasks are described in the Ant chapter.